Sergi's grandmother sent him 10.00 for his birthday. He gave 1/10 of it in church, spent 1/5 of it on a toy, and spent 3/5 of it on a shirt. How much money does he have left?

He has $1 left.

Step-by-step explanation:

In order to calculate the amount of money he have left we need to calculate how much each individual fraction represents from the original value, sum everything that he spent and subtract from the original value. So we have:

church = (1/10) * 10 = 1

toy = (1/5) * 10 = 2

shirt = (3/5) * 10 = 6

total spent = church + toy + shirt = 1 + 2 + 6 = 9

amount left = 10 - total spent = 10 - 9 = 1

He has $1 left.